The mystery caller instructed the News' senior reporter to call the American Embassy in London about "some big news" and then rang off.

In the aftermath of the assassination, the News ran a story on its front page headlined 'World Pays Its Last Tribute' about heads of states from 60 countries paying their respects to the late President.

The article says that Kennedy 'went to a hero's grave today, honoured by a saddened world.'

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It continues: 'Royalty, chiefs of state, prime ministers and high officials from 60 nations gathered to escort the assassinated President through the solemnity of a state funeral, then to a burial spot on a sloping hillside at the Arlington National Cemetery, shrine of soldiers and statemen.'

Archival photos, below, show the aftermath of the assasination. One image captures the chaos seconds after the President was shot.

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A chilling image captured the First Lady with blood coating her normally impeccable attire as she walked hand in hand with her brother-in-law, Attorney General Robert Kennedy, following the coffin carrying the body of President John F. Kennedy.

The coffin is placed in an ambulance after arriving at Andrews Air Force Base, Md. near Washington.

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Another photo captured a heartbreaking, intimate scene of Jacqueline Kennedy kissing the casket of her husband accompanied by their daughter Caroline, kneeling alongside.

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